B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/89
B01J 35/10 (2006.01) B01D 53/94 (2006.01) B01J 23/40 (2006.01) B01J 23/56 (2006.01)
Patent
CA 1219854
Abstract of the Disclosure Alumina particle catalysts which can be used for auto emission control and especially as a three-way catalyst have increased performance. The alumina particles which are preferably spheroids have a low compacted bulk density of about 20 to 36 pounds per cubic foot and a smaller size on the order of less than 2.6 mm for the preferred spheroids. The spheroid embodiment also has a high crush strength. Because of the small size the ratio of the geometric surface area to the bulk volume (GSA/BV) is at least about 14 cm2/cm3. These alumina particles are impregnated with a catalytically-effective amount of one or more platinum group metals such as platinum, palladium or rhodium and additional promoters can also be added. In the preferred embodiment the alumina particles have a GSA/BV ratio of from about 17 to 25 cm2/cm3 for substantially improved performance.
455313
Ernest Michael V.
Kim Gwan
Peters Alan W.
Gowling Lafleur Henderson Llp
Grace (w.r.) & Co.
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